Conventional air pollution monitors are normally fixed on lampposts at about nine feet in the air.

传统的空气污染监测仪通常安装在灯柱上，并被固定在距离地面约九英尺的空中。

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As only a very general rule, most sailboats over 20-something feet have fixed keels.

作为一条通常规律，大部分20英尺以上的帆船使用固定龙骨。

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A cameraman kneels two feet from the heckler and stays there, lens fixed on the old man's face so as not to miss the next outburst.

一位摄影师跪在离这位诘问者两英尺的地方，镜头固定在这位老人的脸上，等着以便不错过他的下一次爆发。

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Until the problem was fixed, Discovery had to sit at least 120 metres (400 feet) from the station for fear that its thrusters might damage the fragile wing if it was loose.

BBC: Discovery docks with space station

For Mr. Forsythe's "Rearray, " the choreographer costumed Ms. Guillem in sleek slacks, a trim top and stocking feet, all in gray-greens, with her hair fixed in a neat, low chignon.

WSJ: Sylvie Guillem | Leaving Ballet Behind | Dance Review by